. Author manuscript; available in PMC: 2018 Jul 30.

Published in final edited form as: JAMA Surg. 2016 Apr;151(4):391–393. doi: 10.1001/jamasurg.2015.3601

Table 1.

Knowledge Questions About Contralateral Prophylactic Mastectomy (CPM)

Question	Answer Options	Correct Answer(s)	Surgeons Who Answered Correctly, No./Total No. (%)
What is the 10-year risk of developing breast cancer in a 40-year-old BRCA carrier newly diagnosed with breast cancer?	<5%, 5%−10%, 10%−20%, 20%−30%, 30%−40%, and/or >40%	20%−30% or 30%−40%³	220/551 (39.9)
Does CPM provide a breast cancer-specific survival benefit for patients with early-stage breast cancer?	Yes or no	No⁴	508/557 (91.2)
What is the contralateral breast cancer risk at 10 years for a 40-year-old woman with no additional risk factors?	<5%, 5%−10%, 10%−20%, 20%−30%, 30%−40%, and/or >40%	<5% or 5%−10%⁵	493/548 (90.0)
What is the 5-year risk of developing a contralateral breast cancer for an invasive ductal carcinoma patient with no additional risk factors?	<2%, 2%−5%, 5%−10%, 10%−15%, 15%−20%, and/or >20%	<2% or 2%−5%⁵	482/552 (87.3)
In a patient with invasive lobular carcinoma, what risk do you quote of developing a contralateral breast cancer over a 5-year period?	<2%, 2%−5%, 5%−10%, 10%−15%, 15%−20%, and/or >20%	<2% or 2%−5%⁵	387/548 (70.6)